JP2002120979A - Elevator governor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a jumping-up of a car by separately setting a car speed when a governor rope is restricted at the time of falling down and raising. SOLUTION: In the elevator using an emergency stop device of dual direction operation type, a second over-speed at the time of descending of a car is detected by an upper governor to act the emergency stop device. A second over-speed at the time of ascending of the car is detected by a lower governor to act the emergency stop device.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elevator speed control device for operating an emergency stop device when a traveling speed of a car reaches a preset overspeed.

[0002]

2. Description of the Related Art FIG. 8 is a configuration diagram showing an example of a conventional elevator. In the figure, a pair of car guide rails 2 and a pair of counterweight guide rails 3 are installed in a hoistway 1. The car 4 is guided up and down the hoistway 1 by the car guide rails 2. The counterweight 5 is guided by the counterweight guide rail 3 and is moved up and down in the hoistway 1.

[0003] Above the hoistway 1, a machine room 6 is provided. In the machine room 6, a driving device (hoist) 7 is installed. A main rope 8 is wound around a drive sheave 7a and a deflector wheel 7b of the drive device 7. The car 4 is suspended from one end of the main rope 8. A counterweight 5 is suspended from the other end of the main rope 8.

An emergency stop device 9 for stopping the car 4 in an emergency is provided below the car 4. A lever 10 for operating the safety device 9 is connected to the safety device 9. In the machine room 6, a governor 11 is installed. The sheave 21 of the governor 11 is wound around the upper end of a loop governor rope 12. Governor rope 1
2 is arranged in the hoistway 1 along the hoisting direction of the car 4. The governor rope 12 is connected to the lever 10 and circulates as the car 4 moves up and down.

[0005] The lower end of the governor rope 12 is wound around a rotatable tension sheave 13. A support arm 14 that supports the tensioning wheel 13 is rotatably connected to the car guide rail 2. A weight 15 is attached to the support arm 14. The governor rope 12 has a tensioner 13 and a support arm 1
The tension is given by the load of 4 and the weight 15.

Next, FIG. 9 is a front view showing a conventional governor 11 disclosed in, for example, Japanese Patent Application Laid-Open No. Hei 6-1561.
In the figure, the sheave 21 around which the governor rope 12 is wound,
It is supported on a base 23 so as to be rotatable about a sheave shaft 22. A pair of fly weights 25 that are rotatable about pins 24 are attached to the side surfaces of the sheave 21. The pair of fly weights 25 are connected to each other by a link 26.

At one end of one fly weight 25,
The operation claw 37 is fixed. Fly weight 25
The sheave 21 is rotated by centrifugal force caused by rotation. Thereby, the operation claw 37 is displaced radially outward of the sheave 21. Between the other end of one flyweight 25 and the sheave 21, there is provided a balance spring 27 that opposes centrifugal force. A car stop switch 28 for operating a brake device (not shown) of the driving device 2 is attached to the base 23. The car stop switch 28 has a switch lever 28 a that is operated by an operating claw 37.

At the other end of one fly weight 25,
A latch section 29 is provided. The base 23 is provided with a ratchet 30 rotatable about the sheave shaft 22. The outer periphery of the ratchet 30 is provided with teeth with which the latch portion 29 engages when the flyweight 25 rotates by a predetermined amount while the sheave 21 is rotating counterclockwise in the drawing. Have been.

A shoe 32 pressed against the governor rope 12 is rotatably mounted on an arm 31 rotatably mounted on the base 23. A spring shaft 33 extends through the spring receiving portion 31a of the arm 31. A connection lever 34 is connected between one end of the spring shaft 33 and the ratchet 30. At the other end of the spring shaft 33,
A spring receiving member 35 is provided. Spring receiving part 31a
A rope gripping spring 36 for pressing the shoe 32 against the governor rope 12 is provided between the spring support member 35 and the spring receiving member 35.

Next, the operation will be described. As the speed governor rope 12 circulates in synchronization with the elevation of the car 4, the sheave 2
1 is rotated. At this time, the flyweight 25 receives a centrifugal force corresponding to the rotation speed of the sheave 21, that is, the speed of the car 4 while revolving with the sheave 21. When the speed of the car 4 exceeds a predetermined value, the fly weight 25
Is rotated about the pin 24 against the balance spring 27.

Further, when the elevator speed of the car 4 reaches the first overspeed (usually about 1.3 times the rated speed), the operation claw 37 is turned by the rotation of the flyweight 25 by centrifugal force, and the car stop switch 28 is turned on. And the switch lever 28a is rotated. This allows
The switch 28 is actuated, the power supply of the driving device 7 is cut off,
The car 4 is stopped by the brake device of the driving device 7.

Further, for example, when the main measure 8 is broken,
Even if the drive device 7 stops, the car 4 continues to descend without stopping, and when the car speed reaches a second overspeed (usually about 1.4 times the rated speed), a sheave corresponding to this speed 2
The fly weight 25 is further rotated by the centrifugal force caused by one rotation, and the latch portion 29 is engaged with the teeth of the ratchet 30. Thereby, the ratchet 30 is slightly rotated together with the sheave 21 in the counterclockwise direction of FIG.

The rotation of the ratchet 30 is controlled by the lever 3
4, transmitted to the arm 31 via the spring shaft 33, the spring receiving member 35, and the rope gripping spring 36.
Is rotated counterclockwise. Thereby, the shoe 32 abuts on the governor rope 12, and the shoe 32 is pressed against the governor rope 12 by the rope gripping spring 36, so that the governor rope 12 is braked. Governor rope 12
Is stopped, the car 4 continues to descend, the lever 10 is operated, and the safety gear 9 operates.

Here, for example, when the car 4 is lighter than the counterweight 5, the driving sheave 7a of the driving device 7 loses driving force, and the braking device of the driving device 7 breaks down to stop the driving sheave 7a. If you can no longer do basket 4
The upward force corresponding to the difference in weight between the counterweight 5 and the basket 4
, The car 4 is accelerated upward. In this case as well, when the ascending speed of the car 4 reaches the first overspeed, the car stop switch 28 is operated. However, if the brake device is out of order, the car 4 is further accelerated without being stopped. .

At this time, if the descending speed of the car 4 reaches the second overspeed, the governor 11
Is restrained, but when the car 4 rises, the car speed
Even if the overspeed is reached, the governor rope 12 is not restrained, and the safety gear 9 does not operate. Thus, the car 4 continues to be accelerated until the counterweight 5 hits a buffer (not shown) at the bottom of the hoistway 1.

When the counterweight 5 collides with the buffer, the car once jumps upward, then descends and stops at a position where the loosened main rope 8 is stretched again. Therefore, in order to avoid the collision of the car 4 with the ceiling of the hoistway 1, it is necessary to provide a sufficient margin to the height dimension of the hoistway 1.

On the other hand, there is also a method of providing an emergency stop of the car 4 rising at an excessive speed by providing a governor, a governor rope, an emergency stop device, and the like on the counterweight 5 side. According to this method, the counterweight 5 can be stopped before colliding with the buffer, and the car 4 can be stopped accordingly. However, in this method, it is necessary to increase the dimensions of the hoistway 1 and the machine room 6.

For example, Japanese Patent Application Laid-Open No. 9-2756 discloses a governor that restrains a governor rope when the car speed reaches a second overspeed not only when the car descends but also when the car rises. I have. By using such a two-way operation type governor in combination with a two-way operation type emergency stop device, the car can be stopped even when the ascending speed of the car reaches the second overspeed, and the car can be stopped. Can be prevented from jumping up.

[0019]

However, in the conventional two-way operation type governor, the car speed when restraining the governor rope can only be set to the same speed when descending and when ascending. Was. On the other hand, in an actual elevator, it may be required to set the second overspeed at the time of descent and the second overspeed at the time of ascending separately, and in the conventional two-way operation type governor, Could not respond.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and it is easy to separately control a car speed when restraining a governor rope when descending and when ascending. It is an object of the present invention to provide an elevator speed control device that can be set and prevent a car from jumping.

[0021]

According to the first aspect of the present invention, there is provided an elevator speed control device provided in a hoistway, connected to an emergency stop device provided in a car, and circulated as the car is raised and lowered. Looped governor rope, and an upper sheave that is wound around the upper end of the governor rope and rotated by circulation of the governor rope. The upper governor that detects the speed and restrains the governor rope to operate the safety gear, and the lower sheave that is wound around the lower end of the governor rope and rotated by circulation of the governor rope And a lower governor that detects an overspeed when the car is traveling in the other direction, restrains the governor rope, and operates an emergency stop device.

According to a second aspect of the present invention, the speed control device for an elevator further includes a movement restricting means for restricting the upward movement of the lower governor.

According to a third aspect of the present invention, there is provided an elevator speed governing device, wherein a chain connected between a weight for applying tension to a governor rope and a lower governor is wound around the chain. A movement restricting means having a chain gear, a ratchet rotated integrally with the chain gear, and a pawl that meshes with the ratchet and regulates rotation of the ratchet in a direction in which the lower governor is displaced upward. It was what was.

According to a fourth aspect of the present invention, there is provided an elevator governor, wherein the lower governor is provided on a lower governor, and the lower governor has a rail for guiding downward displacement of the lower governor. A movement restricting means provided between the groove and the rail for the governor, which regulates upward displacement of the lower governor; Is used.

According to a fifth aspect of the present invention, there is provided an elevator speed governing device having a vertically arranged ratchet rod having a plurality of ratchet teeth, a pawl rotatably provided on the lower governor and meshing with the ratchet teeth; A movement restricting means having a stopper for restricting the rotation of the pawl in a direction in which the lower governor is displaced upward is used.

According to a sixth aspect of the present invention, there is provided an elevator speed governing device, wherein a lower governor is fixed to a car guide rail for guiding the car up and down, and a guide roller rotated by circulation of the governor rope. To apply tension to the governor rope via

[0027]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. Embodiment 1 FIG. FIG. 1 is a configuration diagram showing an elevator according to Embodiment 1 of the present invention. In the figure, a pair of car guide rails 2 and a pair of counterweight guide rails 3 are installed in a hoistway 1. The car 4 is guided up and down the hoistway 1 by the car guide rails 2. The counterweight 5 is guided by the counterweight guide rail 3 so that the hoistway 1
It is raised and lowered inside.

A machine room 6 is provided above the hoistway 1. In the machine room 6, a driving device (hoist) 7 is installed. A main rope 8 is wound around a drive sheave 7a and a deflector wheel 7b of the drive device 7. The car 4 is suspended from one end of the main rope 8. A counterweight 5 is suspended from the other end of the main rope 8.

An emergency stop device 41 for stopping the car 4 in an emergency is provided below the car 4. The safety device 41 is of a bidirectional operation type that operates both when the car 4 is lowered and when it is raised. A lever 42 for operating the emergency stop device 41 is connected thereto.

An upper governor 43 having a rotatable upper sheave 44 is installed in the machine room 6. Upper governor 4
The specific configuration of 3 is, for example, the same as that of FIG. The upper sheave 43 is wound around the upper end of the loop governor rope 12. The governor rope 12 is disposed in the hoistway 1 along the direction in which the car 4 moves up and down. Further, the governor rope 12 is connected to the lever 42 and the cage 4
Is circulated along with the rise and fall of

A lower governor 45 having a rotatable lower sheave 46 is disposed below the hoistway 1. A lower end of the governor rope 12 is wound around the lower sheave 46. The specific configuration of the lower governor 45 is, for example, the same as that of FIG. However, the car stop switch 28 may not be provided in the lower governor 45 but may be provided only in the upper governor 43.

In the lower part of the hoistway 1, a pair of governor rails 47 are provided parallel to the car guide rails 2. The lower governor 45 is provided with a pair of engaging portions 48 that engage with the governor rail 47. Lower governor 45
Can be displaced downward along the governor rail 47.

The lower governor 45 has a weight 5 via a chain 49.
It is pulled downward by 0. As a result, tension is applied to the governor rope 12. Chain 49 is the first
And the second chain gears 51 and 52. The first chain gear 51 is supported on a first support 54 so as to be rotatable about a shaft 53. The ratchet 55 is connected to the shaft 53
Are rotated integrally with the first chain gear 51.

A claw 56 meshing with the teeth of the ratchet 55 is attached to the first support 54 so as to be rotatable about a shaft 57. Between the first support 54 and the claw 56,
A pull spring 58 is provided for urging the claw 56 in a direction for rotating the claw clockwise in the drawing. The first support base 54 is provided with a stopper 59 for restricting the rotation of the claw 56 in the clockwise direction in the drawing. The second chain gear 52 is connected to the second support 6.
It is rotatably supported at zero.

The movement restricting means according to the first embodiment includes a chain 4
9, a first chain gear 51, a second chain gear 52, a shaft 53, a first support 54, a ratchet 55, a claw 56, a shaft 57, a pull spring 58, a stopper 59, and a second support 60. are doing.

Next, the operation will be described. When the car 4 is raised and lowered, the governor rope 12 is circulated and the upper sheave 44 and the lower sheave 46 are rotated accordingly. When the speed of the car 4 reaches a preset first overspeed (usually about 1.3 times the rated speed) during the ascent operation or the descent operation, this is detected by the upper governor 43 and the driving device 7
Is shut off, and the car 4 is stopped by the brake device of the driving device 7.

Further, for example, when the main measure 8 is broken,
Even if the driving device 7 stops, the car 4 continues to descend without stopping, and when the car speed reaches the second overspeed (usually about 1.4 times the rated speed), the upper governor 43 And the upper governor 43 restrains the governor rope 12. As a result, when the circulation of the governor rope 12 is stopped, the car 4 continues to descend, the lever 42 is operated upward, and the safety device 41 operates.

Further, for example, when the car 4 is lighter than the counterweight 5, the driving sheave 7a of the driving device 7 loses the driving force, and the braking device of the driving device 7 breaks down to stop the driving sheave 7a. If you can no longer, basket 4
The upward force corresponding to the difference in weight between the counterweight 5 and the basket 4
, The car 4 is accelerated upward.

When the ascending speed of the car 4 reaches a second overspeed preset in the lower governor 45, it is detected by the lower governor 45 and the lower governor 45 controls the governor. The rope 12 is restrained. As a result, when the circulation of the governor rope 12 is stopped, the car 4 continues to move upward, whereby the lever 42 is operated downward and the safety device 41 operates.

Therefore, the car speed (second overspeed at the time of descent and at the time of ascending) when restraining the governor rope 12 can be easily set separately at the time of descent and at the time of ascending, so that the car 4 can jump up. Can be prevented.

Further, since the ratchet 55 is rotatable clockwise in the drawing, the tension by the weight 50 can always be applied to the speed governor rope 12, and the elongation of the speed governor rope 12 can be coped with. However, since the rotation of the ratchet 55 is regulated in the counterclockwise direction in the figure, the upward displacement of the lower governor 45 is also regulated. Therefore,
When the governor rope 12 is restrained by the lower governor 45, the lower governor 45 is prevented from jumping up due to the rise of the car 4, and the safety gear 41 can be operated more reliably.

Embodiment 2 Next, FIG. 2 is a configuration diagram showing an elevator according to a second embodiment of the present invention, and FIG.
FIG. 3 is a sectional view taken along line III-III of FIG.
It is sectional drawing which follows the IV line. In the figure, the lower governor 4
5 is a weight 6 for applying tension to the governor rope 12.
1 is mounted. The lower governor 45 is provided with a pair of engaging portions 62 that engage with the governor rail 47.

Each engaging portion 62 has a tapered groove 62a into which the governor rail 47 is inserted. The width of the groove 62a extends upward. Each groove 6
A roller 63 for restricting the upward displacement of the lower governor 45 is settled in 2a. The movement restricting means according to the second embodiment includes a governor rail 47, an engagement portion 62, and a roller 63. Other configurations are the same as those of the first embodiment.

In such a governor, the lower governor 45
And the lower governor 45 can be displaced downward, so that tension can always be applied to the governor rope 12, and the elongation of the governor rope 12 can be handled. The upward displacement of the lower governor 45 is regulated by the rollers 63 biting between the groove 62a and the governor rail 47. Therefore, when the governor rope 12 is restrained by the lower governor 45, the lower governor 45 is prevented from jumping up due to the rise of the car 4, and the safety device 41 can be operated more reliably. .

Embodiment 3 Next, FIG. 5 is a front view showing a main part of an elevator speed governing device according to Embodiment 3 of the present invention. In the figure, a weight device 64 that applies tension to the governor rope 12 is connected to the lower governor 45. The weight device 64 includes a rail 6 installed in the hoistway 1.
5 can be lowered.

A lock device 66 is attached to the rail 65. The lock device 66 is fixed to the rail 65 by frictional force generated by the spring force of the spring 67. The lock device 66 supports a pair of rollers 69 via a pair of rods 68. The weight 65 has a rail 65.
Is provided with a tapered groove 64a into which the groove is inserted. The roller 69 is disposed between the side surface of the groove 64a and the rail 65. Other configurations are the same as those of the first embodiment.

In such a governing device, the locking device 66
Does not descend with the weight of the rod 68 and the roller 69.
However, due to elongation of the governor rope 12, etc., the weight device 64
When the weight is added, the lock device 66 is slid downward along the rail 65. Accordingly, tension can always be applied to the governor rope 12, and it is possible to cope with the elongation of the governor rope 12.

The upward displacement of the lower governor 45 is
The roller 69 is regulated by biting between the groove 64a and the rail 65. Therefore, when the governor rope 12 is restrained by the lower governor 45, the lower governor 45 is prevented from jumping up due to the rise of the car 4, and the safety device 41 can be operated more reliably. .

Embodiment 4 Next, FIG. 6 is a configuration diagram showing an elevator according to Embodiment 4 of the present invention. In the figure, the lower governor 45 can be displaced downward along the governor rail 47. In the lower governor 45,
A weight 61 for applying tension to the governor rope 12 is mounted.

In the hoistway 1, a ratchet rod 71 having a plurality of ratchet teeth is fixed in parallel with the governor rail 47. The lower governor 45 is provided with a pawl 72 that meshes with the ratchet teeth so as to be rotatable about a shaft 73. A tension spring 74 is provided between the lower governor 45 and the pawl 72 to bias the pawl 72 clockwise in the drawing. The lower governor 45 is provided with a stopper 75 for restricting the rotation of the claw 72 in the counterclockwise direction in the figure.

The movement restricting means according to the fourth embodiment has a ratchet rod 71, a pawl 72, a shaft 73, a tension spring 74 and a stopper 75. Other configurations are the same as those of the first embodiment.

In such a speed governing device, the lower governor 45 can be displaced downward with respect to the ratchet rod 71 because the pawl 72 can rotate clockwise in the drawing. Therefore, tension can always be applied to the governor rope 12,
It is possible to cope with the elongation of the governor rope 12.

However, since the rotation of the pawl 72 is restricted in the counterclockwise direction in the figure, the upward displacement of the lower governor 45 is also restricted. Therefore, when the governor rope 12 is restrained by the lower governor 45, the lower governor 45 is prevented from jumping up due to the rise of the car 4, and the safety device 41 can be operated more reliably. .

Embodiment 5 FIG. Next, FIG. 7 is a configuration diagram showing an elevator according to a fifth embodiment of the present invention. In the figure, the lower governor 45 is fixed to the car guide rail 2, and the displacement in the vertical direction is also restricted. An upper guide roller 76 and a lower guide roller 77 are supported on the car guide rail 2 at an interval vertically.
The governor rope 12 is wound around part of the outer periphery of the upper guide roller 76 and the lower guide roller 77, respectively.

In the hoistway 1, there is provided a support arm 79 which is rotatable about a shaft 78. An intermediate guide roller 80 is supported at one end of the support arm 79. The intermediate guide roller 80 is disposed between the upper guide roller 76 and the lower guide roller 77. Intermediate guide roller 8
The governor rope 12 is wound around a part of the outer periphery of the zero.

At the other end of the support arm 79, the support arm 79 is rotated in a direction (counterclockwise in the drawing) in which the angle of winding the governor rope 12 around each of the guide rollers 76, 77, 80 is increased. A weight 81 is mounted. Governor rope 12
Is tensioned by a weight 81. Other configurations are the same as those of the first embodiment.

In such a governor, the lower governor 45
The lower governor 45 is fixed to the car guide rail 2, so that when the governor rope 12 is restrained by the lower governor 45, the lower governor 45 is prevented from jumping up due to the rise of the car 4. The stopping device 41 can be operated more reliably.

Further, the tension caused by the weight 81 is
Since the speed control rope 12 is provided to the speed control rope 12 via the support arm 79, the tension can always be applied to the speed control rope 12 and the expansion of the speed control rope 12 can be coped with.

In the first to fifth embodiments, the upper governor 43 detects the second overspeed when descending, and the lower governor 45 detects the second overspeed when ascending. It may be.

[0060]

As described above, the elevator governor according to the first aspect of the present invention is provided with a lower governor separately from the upper governor, and provides a governor between the upper sheave and the lower sheave. Since the speed rope is wrapped around, the speed of the car when restraining the speed governor rope can be easily set separately at the time of descent and at the time of ascent, so that the car can be prevented from jumping up.

In the elevator governing device according to the second aspect of the present invention, since the movement regulating means for regulating the upward movement of the lower governor is used, when the governor rope is stopped, the car is raised. Accordingly, the lower governor can be prevented from jumping up, and the safety gear can be operated more reliably.

According to a third aspect of the present invention, there is provided an elevator speed governing device comprising a chain connected between a weight for applying tension to a governor rope and a lower governor, and the chain wound around the chain. A movement restricting means is used which has a chain gear that is rotated, a ratchet that is integrally rotated with the chain gear, and a claw that meshes with the ratchet and restricts rotation of the ratchet in a direction in which the lower governor is displaced upward. So, with a simple configuration,
The lower governor can be prevented from jumping up, and the safety gear can be operated more reliably.

The elevator governor according to the invention of claim 4 is provided with a governor rail for guiding the downward displacement of the lower governor and the lower governor, and the governor rail is inserted. A movement restricting means, which is provided between the groove and the governor rail and regulates upward displacement of the lower governor, wherein the engagement portion has a tapered groove formed therein. Since it was used, with a simple configuration, it is possible to prevent the lower governor from jumping up, and to operate the safety gear more reliably.

According to a fifth aspect of the present invention, there is provided an elevator speed governing device which comprises a ratchet rod vertically arranged and having a plurality of ratchet teeth, a pawl which is rotatably provided on a lower governor, and which meshes with the ratchet teeth. Since the movement restricting means having the stopper for restricting the rotation of the pawl in the direction in which the governor is displaced upward is used, it is possible to prevent the lower governor from jumping up with a simple structure, The stopping device can be operated more reliably.

According to a sixth aspect of the present invention, the lower speed governor is fixed to a car guide rail for guiding the elevator of the car, and tension is applied to the governor rope via a guide roller. Because it was given, with a simple configuration, it is possible to prevent the lower governor from jumping up,
The emergency stop device can be operated more reliably.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing an elevator according to a first embodiment of the present invention.

FIG. 2 is a configuration diagram illustrating an elevator according to a second embodiment of the present invention.

FIG. 3 is a sectional view taken along the line III-III in FIG. 2;

FIG. 4 is a sectional view taken along the line IV-IV in FIG. 2;

FIG. 5 is a front view showing a main part of an elevator speed governor according to Embodiment 3 of the present invention.

FIG. 6 is a configuration diagram showing an elevator according to a fourth embodiment of the present invention.

FIG. 7 is a configuration diagram showing an elevator according to a fifth embodiment of the present invention.

FIG. 8 is a configuration diagram illustrating an example of a conventional elevator.

FIG. 9 is a front view showing an example of a conventional governor.

[Explanation of symbols]

1 hoistway, 4 cars, 12 governor rope, 41 emergency stop device, 43 upper governor, 44 upper sheave, 45
Lower governor, 46 lower sheave, 47 governor rail, 49 chains, 50 weights, 51 first chain gear, 52
Second chain gear, 55 ratchet, 56,72 pawl,
62 engaging portion, 62a groove, 63 roller, 71 ratchet bar, 75 stopper, 80 intermediate guide roller.

Claims (6)

[Claims] 1. A loop-shaped speed governor rope connected to an emergency stop device provided in a hoistway and provided on a car and circulated as the car elevates and lowers, an upper end of the governor rope. Having an upper sheave rotated by circulation of the governor rope, and detecting the overspeed when the car is traveling in one direction to restrain the governor rope, An upper governor for operating the safety gear, and a lower sheave around which a lower end of the governor rope is wound and rotated by circulation of the governor rope, wherein the car travels in the other direction. A speed control device for an elevator, comprising: a lower speed governor that detects an overspeed during operation and restrains the governor rope to operate the emergency stop device. 2. The speed control device for an elevator according to claim 1, further comprising a movement restricting means for restricting upward movement of the lower governor. 3. The movement restricting means includes: a chain connected between a weight for applying tension to the governor rope and the lower governor; a chain gear around which the chain is wound; A ratchet that is rotated integrally with the chain gear, and a pawl that meshes with the ratchet and regulates rotation of the ratchet in a direction in which the lower governor is displaced upward. 2. The elevator governor according to claim 2. 4. The movement regulating means includes a governor rail for guiding a downward displacement of the lower governor, and a tapered shape provided on the lower governor and into which the governor rail is inserted. An engagement portion having a groove formed therein, and a portion provided between the groove and the governor rail to regulate upward displacement of the lower governor. 3. The speed control device for an elevator according to claim 2, wherein: 5. The movement restricting means is vertically arranged, a ratchet rod having a plurality of ratchet teeth, rotatably provided on a lower governor, a claw meshing with the ratchet teeth, and a lower governor comprising: 3. A stopper for restricting rotation of the claw in a direction to be displaced upward.
An elevator governor according to any of the preceding claims. 6. The lower governor is fixed to a car guide rail that guides the car up and down, and tension is applied to the governor rope via a guide roller rotated by circulation of the governor rope. Is provided.
An elevator governor according to any of the preceding claims.